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(No Model.)

G. W. BROWN. Safety Hod Elevator.

No. 240,227. atented April 19,1881.

N4 PETERS, PHOTO LITHOG GEORGE WV. BROWN,

OF NEW YORK, N. Y.

SAFETY HOD-ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 240,227, dated April19, 1881 Application filed February 17, 1881.

To all whom it may concern Be it known that I, GEORGE W. BROWN, of thecity of New York, in the county and State of New York, have inventedcertain new and useful Improvements in Safety Hod-Elevators, of whichthe following is a specification.

The objects of myinvention are to construct a bod-elevating apparatuswith metallic tubular frames, which shall be consequently lighter,stronger, more durable, and cheaper than those now in use, which shallbe safe to use, and which shall have sufficient tractite power, from theimproved construction hereinafter described, to elevate materials in acontinuous supply sufficient for the high buildings now common in largecities, without a corresponding increase in the tension and expenditureof power. These objects are attained by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 represents a front elevation,and Fig. 2 represents a side elevation, of my improved safetyhod-elevator, wherein similar-let-- ters of reference indicatecorresponding parts.

I construct the bottom frame, containing the driving machinery, ofmetallic tubes or pipes, cut into the required lengths and joinedtogether in the desired form by the ordinary elbows and TS or suitablecouplings, and thereby greatly increase the strength and durability ofthe frame, and at the same time make it lighter and more easily handledand more inexpensive than usual.

B B is the bottom of the frame, and A A uprights, connected at the topby a suitable plate strapped to the bottom by turn buckles or equivalentmeans, to secure greater rigidity. Sliding between these uprights is acasting, L, fitted to hold and connect the boxes or bearings for twoshafts, the lower carrying the actuating or driving pulleys I I andspur-gearing P P, and the upper carrying the pinion 0 and doubleratchet-wheel having circumferentially two parallel series or sets ofteeth, a c, pointing in opposite directions and respectively engagingthe two pawls b (1. One pawl is intended to be always in position toprevent the combined weight of the ascending loaded hods reversingmotion, should the laborers turning the machine leave suddenly throughfright, and the other pawl is intended (No model.)

to be always ready to come into position and positively stop allascending motion when the top hod reaches a certain height, and, by itsascending motion and a connectingstring. pulls it into positiomasspecified, claimed, and allowed in Letters Patent No. 149,636, hithertogranted to me.

The spur-gearing may be cast to the side of one of the actuating ordriving pulleys, as shown in Fig. 1, or may be the ordinary wheelgearing with the pinion in the usual manner. The two actuating ordriving pulleys I I are constructed with a sufficiently-deepcircumferential groove having alternate projections, and preferablycorresponding recessions opposite, upon each cheek, thus forming anundulated channel, which obliges the cable going over the pulley to takethe undulated or zigzag direction, (shown in Fig. 1,) and thusholding-the cable solidly, and yet permitting it to wind or unwind asthe pulley turns. The traction is thus greatly increased, and anelevator thus constructed is capable of raising enough hods continuouslyto supply the demand for materials made by the high buildings now usualin large cities. Thewire cables pass around these pulleys and over andaround two plain pulleys, J J, similarly located at the proper heightupon a shaft provided with suitable bearings supported by the tubularframe A A. The cables are connected by parallel horizontal bars arrangedat such distances apart as to support the bowl and lower part of theshank of the hod, as shown in Fig. 2. These bars are fastened to thecables by ordinary clips and bolts, and should be made to stand out fromthe cables, by means of a small suitable block between the bar and thecable, sufficiently to pass over the flanges of the pulleys. Each barhas upon each edge, as shown in Fig. 1, near and upon each side of itscenter, two projections, to cause the hod-bowl to center upon the barand there retain its seat. These projections may be continued on theface of the bar, to engage the hodshank; The cables are tied together inthe usual manner.

In the angular bottom of the hod-bowl, near its open end, is let asuitable notch, preferably lined with metal, and shown at e in Fig. 3,to engage the edge of the bar, as shown in Fig. 4, between theprojections aforesaid and pre vent the hod falling from its seatthereon. Full hods are elevated and empty hods returned in the usualmanner. sufficieutly indicated in the drawings and known in the art.

To secure greater adjustability, and to increase the tension of thecables by the Weight of the gearing, the shafts, connected by thecastings aforesaid and carrying the actuating or driving gearing andpulleys, are suspended in and by the cables, and any greater tensionneeded is given by the set-screws E E.

I also construct and use, as shown in Fig. 1, a metallic tubular handle,M, radially adjustable about the shaft as a center, to provide greateror less leverage, according to the load being elevated, and fixed at thedesired leverage by means of the set-screw N.

Having thus fully and sufficiently described my invention, I claim asnew and desire to secure by Letters Patent 1. A hod-elevating apparatushaving metallic tubular frames, constructed and arranged substantiallyas specified.

2. A hod-elevating apparatus havingactuating or driving pulleys withsufficiently deep circumferential grooves, presenting alternateprojections and preferably corresponding recessions opposite on eachcheek, whereby an undulating channel is formed, as and for the purposesubstantially as specified. v

3. A hod-elevatin g apparatus having a handle radially adjustable aboutthe shaft as a center, to provide greater or less leverage,substantially as specified.

4. A bod-elevating apparatus having a double ratchet-Wheel presen tingcircui'nferential ly two parallel series or sets of teeth pointing inopposite directions, and each set provided with a pawl Working in itsrespective path, in the manner and for the purpose substantially asspecified.

5. A metallic-lined notch in the angular bottom of a bod-bowl, near theopen end thereof,

in combination with a bar connecting two ca-' bles, and having onitsedges, near and on each side of its center, two projections, as and forthe purpose substantially as specified.

GEO. WV. BRO YVN.

Witnesses GEORGE W. BROWN, Jr., HENRY L. VAN GLEAF.

